Climatic Features of Cloud Water Distribution and Cycle over China

• Published in: Advances in atmospheric sciences Vol. 25; no. 3; pp. 437 - 446
• Main Author: 李兴宇 郭学良 朱江
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science Press 01.05.2008; Springer Nature B.V; Graduate University of Chinese Academy of Sciences, Beijing 100049%Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
• Subjects: Atmospheric Sciences; Basins; China; Climate science; Climatology; Clouds; Earth and Environmental Science; Earth Sciences; Geophysics/Geodesy; Hydrologic cycle; Hydrologic data; Hydrology; Mathematical analysis; Meteorology; Precipitation; Seasonal variations; Trends; Water distribution; Water vapor; 气候特征; 水云循环; 水云路径; climatic features; cloud water path; cloud water cycle; ISCCP
• ISSN: 0256-1530; 1861-9533
• DOI: 10.1007/s00376-008-0437-2

Analyses of cloud water path （CWP） data over China available from the International Satellite Cloud Climatology Project （ISCCP） are performed for the period 1984-2004. Combined with GPCP precipitation data, cloud water cycle index （CWCI） is also calculated. The climatic distributions of CWP are found to be dependent on large-scale circulation, topographical features, water vapor transport and similar distribution features which are found in CWCI except in the Sichuan Basin. Influenced by the Asia monsoon, CWP over China exhibits very large seasonal variations in different regions. The seasonal cycles of CWCI in different regions are consistent and the largest CWCI occurs in July. The long-term trends of CWP and CWCI are investigated, too. Increasing trends of CWP are found during the period with the largest increase found in winter. The decreasing trends of CWCI dominate most regions of China. The differences in long-term trends between CWP and CWCI suggest that CWP only can influence the variation of CWCI to a certain extent and that other factors need to be involved in cloud water cycle researches. This phenomenon reveals the complexity of the hydrological cycle related to cloud water.